import java.util.HashMap;

public class NumberSeven {
    public static void main(String[] args) {
        HashMap<String,String> hashMap=new HashMap<>();
        hashMap.put("001","李晨");
        hashMap.put("002","范冰冰");

        HashMap<String,String> hashMap1=new HashMap<>();
        hashMap1.put("001","马云");
        hashMap1.put("002","马化腾");

        HashMap<String,HashMap<String,String>> classHashMap=new HashMap<>();
        classHashMap.put("Java基础班",hashMap);
        classHashMap.put("Java就业班",hashMap1);

        classHashMap.forEach((k,v)->System.out.println(k+v));

    }
}
